At the beginning of the 20th century, urbanization and occupation of privileged spaces at the expense of “lowland” spaces and close to a floodplain. The “lowlands” were occupied by a population, mostly with socioeconomic needs, forming housing groups susceptible to flooding and flooding. To bring the recognition of rights to these occupants, a land regularization work was carried out by the Federal University of Pará - UFPA, together with public entities from the State and the Union. The article aims to present and compare the degree of socio-environmental vulnerability in the area of land C of UFPA in the municipality of Belém, object of land regularization activity, applying indicators and indices related to social, economic, legal and environmental issues. The results show that the degree of vulnerability is high in the years surveyed, concluding that the legal regularization work carried out in the area was only patrimonial, in order to transfer responsibilities for land use to the beneficiary residents and the recognition of the right of that title by law. . Effective land regularization work should involve a set of bodies responsible for the social, environmental, urban and land areas so that, in a concatenated and long-term manner, the work carried out is carried out so that the results are captured by the indicators and that the data decrease the degree of socio-environmental vulnerability in the studied area.